[KafkaIO] Update tracker and watermark for non-visible progress

[sjvanrossum]

Calls to poll have timed out if ConsumerRecords.empty() is (by reference) equal to the result of poll.
All other instances may have non-visible records at the end of a batch which should be skipped over while still claiming up to the next offset and updating the watermark.

Stacked on top of #34201.

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[sjvanrossum]

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[chamikaramj]

Any updates ?

[chamikaramj]

@robertwb @ahmedabu98 or @johnjcasey PTAL.